- Add stateDerived metadata to AgentHealthStatus to indicate when health text only mirrors agent.state
- Update getAgentHealthStatus to set stateDerived consistently across terminated, error, paused, running, heartbeat, idle, and disabled paths
- Update AgentDetailView, AgentListModal, and AgentsView to render icon-only health badges when labels are state-derived while preserving full labels via title tooltips
- Expand agentHealth tests with explicit stateDerived assertions and a table-driven semantics suite for representative states
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